4 Answers
4

A friend pointed out that there are nearby geysers that shoot you way up in the air. By properly timing a run into the closest geyser (or simply standing in the right place), it is possible to land on top of the big pig, which will net you challenge success.

This can't be done with Krieg. His mass is increased so he doesn't get knocked around much, especially while using his action skill, and it keeps the geyser from lifting him enough. As of yet, I don't think Krieg can complete this challenge.